1400 Yard (3/4 Mile) Range; Patented, revolutionary curved transmitter design and function with multiple Grip positions; 16 easily adjustable Gentle Touch levels of Nick and Continuous e-Stim; "Rapid Access" button can be programmed for Nick (1/2 second stimulation), Continuous (up to 8 second stimulation), or Vibration Assist (vibration only); MAXX-Range 360 Internal Collar Antenna System for 360 degree signal reception in all terrain types; Transmitter "Lockout" feature prevents unwanted corrections or accidental button activation; Fully adjustable collar Fits small to large dogs (6" to 22" neck size); Expandable to 2-dog or 3-dog system with R.A.P.T. Add-On collars: Toggle switch on Transmitter easily selects between dogs; Built in Magnetic ON/OFF system (NO on/off button to break); Waterproof FLOATING Transmitter/Remote uses 9V battery (not included)